Does aspect ratio change AI video price on Sume? No, resolution does
On Sume's per-second video rows the rate is keyed by resolution, not aspect ratio, so 9:16 and 16:9 cost the same. The real price levers, in a table.
A common budgeting worry is that a vertical or square clip costs more than a landscape one. On Sume's per-second video rows it does not. The catalog prices each row by resolution, and Kling Video v3 Pro by audio on or off, and there is no aspect ratio key in any of them. A 9:16 clip and a 16:9 clip of the same length, row and resolution reserve and bill the same amount.
What does change the price?
Four things, in rough order of size.
| Lever | Effect | Example |
|---|---|---|
| Resolution | Largest | Wan 3.0 from $0.0625 at 480p to $0.25 per second at 1080p |
| Duration | Linear | Twice the seconds, twice the cost, rounded up to the cent per job |
| Model | Large | 480p is $0.0625 per second on Wan 3.0 and $0.3975 on Genjutsu |
| Audio | Kling only | $0.14 off, $0.21 on, per second |
Is there anything about aspect ratio that does cost?
Indirectly, yes. A ratio can limit your row choice, and the row sets the rate. Gemini Omni Flash 1.1 only lists 16:9 and 9:16, so a 1:1 ad cannot use it. 21:9 is available on the MiniMax rows and Seedance, not on Wan 3.0 or Kling. Choosing the ratio first can therefore leave you with a pricier row, even though the ratio itself carries no fee.
The Seedance rows are billed per video token; a different frame at the same resolution can change the token count, so treat the finished job's usage.cost as the figure of record there.
How do I verify it?
Submit two short requests that differ only in aspect_ratio on a per-second row and compare usage.cost on each finished job. The docs describe usage.cost as the Sume billable amount.
Sources
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